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Investments Securities - Amortized Cost and Fair Values of Investments in Debt Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Available-for-sale
Amortized Cost	$ 40	$ 100,041
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(2)	(537)
Fair Value	38	99,504
Allowance for Credit Losses	0	0
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Amortized Cost	48,582
Fair Value	49,159
Amortized Cost	48,622	150,901
Gross Unrealized Gains	711	467
Gross Unrealized Losses	(136)	(823)
Fair Value	49,197	150,545
Allowance for Credit Losses	0	0
U.S. Treasury securities
Available-for-sale
Amortized Cost		99,996
Gross Unrealized Gains		0
Gross Unrealized Losses		(535)
Fair Value		99,461
Allowance for Credit Losses		0
U.S. Agency collateralized mortgage obligations
Available-for-sale
Amortized Cost	40	45
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(2)	(2)
Fair Value	38	43
Allowance for Credit Losses	0	0
U.S. Agency residential mortgage-backed securities
Debt Securities, Held-to-maturity, Fair Value to Amortized Cost [Abstract]
Amortized Cost	48,582	50,860
Gross Unrealized Gains	711	467
Gross Unrealized Losses	(134)	(286)
Fair Value	49,159	51,041
Allowance for Credit Losses	$ 0	$ 0

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